
Every 2 years
▶ Check the filler cap.
▶ Check the condition of fuel filler tubes and the sealing ring in the fuel filler
tubes, and clean the sealing ring if necessary.
▶ Check the gas system for leaks.
Every 4 years
▶ Inspect the gas tank.
Every 20 years ▶ Replace the gas tank.WARNING■ Do not underestimate the smell of gas in the car or when refuelling - risk
of fire, explosion and injury.■
The natural gas tanks in the vehicle must not be exposed to unwanted
heat sources.
Engine compartment
Introduction
This chapter contains information on the following subjects:
Opening and closing the bonnet
195
Engine compartment overview
196
Radiator fan
196
Windscreen washer system
196WARNINGWhen working in the engine compartment, injuries, scolding, accident or
fire hazards may arise. For this reason, it is essential to comply with the
warning instructions stated below and with the general applicable rules of
safety. The engine compartment of your car is a hazardous area!WARNINGInstructions before beginning work in the engine compartment■Turn off the engine and remove the ignition key.■
Firmly apply the handbrake.
■
For vehicles with manual transmission the lever into the neutral position.
WARNING (Continued)■ On vehicles with automatic transmission, shift the selector lever into the
P position.■
Allow the engine to cool.
■
Never open the bonnet if you can see steam or coolant flowing out of the
engine compartment – risk of scalding! Wait until the steam or coolant has
stopped escaping.
WARNINGInformation for working in the engine compartment■Keep all people, especially children, away from the engine compartment.■
Never touch the radiator fan. The fan might suddenly start running!
■
Do not touch any hot engine parts – risk of burns!
WARNINGInformation for working in the engine compartment with the engine run-
ning■
Pay particular attention to moving engine parts, e.g. V-ribbed belt, gener-
ator, radiator fan - danger to life!
■
Never touch the electric wiring on the ignition system.
■
Avoid short circuits in the electrical system, particularly on the vehicle's
battery.
■
Always make sure that no jewellery, loose clothing or long hair can get
caught in rotating engine parts – risk of death! Always remove any jewel-
lery, tie back long hair and wear tight fitting clothing before completing any
work.
WARNINGInformation for working on the fuel system or the electrical system■Always disconnect the vehicle battery from the electrical system.■
Do not smoke.
■
Never work near open flames.
■
Always have a functioning fire extinguisher nearby.
WARNING■ Read the information and warning instructions on the fluid containers.■Keep the working fluids in sealed original containers and safe from peo-
ple who are not completely independent, e.g. children. 194General Maintenance

CleanAnodized parts184
Chrome parts184
Cleaning Alcantara
187
and maintaining belts188
artificial leather187
headlight glasses185
materials187
natural leather187
plastic parts184
seats covers of the electrically heated seats188
wheels185
Cleaning safety belt
188
Cleaning seat covers
188
Cleaning the interior artificial leather
187
Seat covers188
Cleaning the vehicle exterior Camera lens
185
Cavity protection185
Decorative films183
Door locking cylinder185
Headlight glasses185
Protective films183
Under-body protection186
wheels185
Windows and external mirrors184
Cleaning vehicle181
Cleaning vehicle exterior182
Anodized parts184
Chrome parts184
Plastic parts184
Rubber seals184
Vehicle paint work183
Wiper blades186
Clean interior Safety belt
188
Climatronic air distribution control115
Automatic operation115
Operating elements114
Clothes hook96
CNG193
Gas leak193
in a traffic accident193
Natural gas reserve display30
refuelling192
Refuelling192
Regular checks193
Sticker193
Warning light37
Cockpit 12-Volt power outlet
93
Ashtray92
Cigarette lighter92
General view27
Lighting74
storage compartments89
useful equipment89
COMING HOME73
compartments89
Component protection180
Components of the puncture repair kit217
Compressed natural gas see CNG
193
Computer see multifunction display
41
Convenience operation sliding / tilting roof
65
Window64
convenience turn signal69
Coolant198
Checking199
Replenishing200
Temperature gauge29
Warning light37
Warning messages37
CORNER see Headlights with CORNER function73
Correct routing of seat belt
12
Correct seated position8
Front passenger10
Rear seats10
Correct seat position Driver
9
Counter for distance driven30
Crew Protect Assist160
cruise control operation
148
operation Description149
Cruise control system Warning light
36
Cruise Control System148
Cup holders91
D
DAY LIGHT see Daylight running lights
68
Daylight running lights68
De-icing windows
184
De-icing the windscreen and rear window76
Deactivating an airbag19
Decorative films183
Delayed locking of the boot lid see boot lid
59
Departure angle243
Diesel refer to Fuel
191
Diesel fuel Operation in winter
191
Diesel particulate filter38
information messages38
Digital Clock31
Dipstick198
251Index

Fog lights72
Warning light36
Fold in passenger's mirror80
Footmats128
see footmats128
Force limit Electric boot lid
60
Power windows63
Sliding/tilting roof65
Front airbag15
Front Assist155
Disable/enable156
Distance warning156
Information messages157
Operation155
Radar sensor135
Warning and automatic braking156
Warning light40
Front door warning light75
fuel lead-free petrol
190
Fuel189
CNG193
Diesel191
Natural gas reserve display30
Petrol / Diesel reserve display30
refer to Fuel189
Refuelling189
Refuelling - natural gas192
Warning light36
Fuel consumption239
Fuel filter Warning messages
39
Fuel reserve Warning light
36
Fuses Assignment
226
Assignment of fuses in the dash panel228
Colour coding226
Fuse assignment in the engine compartment 229
Plastic clip229
Replacing226
G
Gear change Gear recommendation
41
Information on the selected gear41
Gear changing Gear stick
128
General view Cockpit
27
Genuine parts179
Glasses compartment95
Glow plug system Warning light
34
H
Handbrake
127
Warning light32
Hazard warning light system73
HBA137
Head airbag18
Headlight cleaning system Headlight cleaning system
78
Headlights Bulb arrangement
231
Driving abroad74
Headlight cleaning system78
Headlights with CORNER function73
Headrest Removing and installing
83
Head restraints82
Adjust height82
Heater Windscreen and rear window
76
Heating112
Air distribution control115
Controls113
Exterior mirrors80
Seats85
HHC137
High-beam assistant71
High beam assistant Warning light
39
Hill Start Assist (HHC)137
Hitch167
Drawback load167
Hook103
Horn27
I
Ice scrapers
184
Ignition lock121
Immobilizer120
Individual settings Locking
56
Unlocking56
Inertia reel13
Information system40
Compass point display49
Door warning40
Eco-tips49
Gear recommendation41
Lap timer48
MAXI DOT display44
Multifunction display41
operation42
Service interval display49
Stop watch48
Information system operation42
Infotainment4
Instrument cluster28
Auto-check control40
Counter for distance driven30
Display29
Overview28
Revolutions counter29
253Index

P
Park assist Departing from a parallel parking space
147
Information messages147
Parking146
Park Assist144
Automatic brake assist147
Operation145
Parking space search146
Parking128
Park Assist144
Parking aid140
Rear View Camera143
Parking aid140
Automatic system activation when moving for- ward
143
Function141
Parking assistance Activation / deactivation
142
Display in the Infotainment display142
Parking lights68
Park Pilot140
Park the vehicle see Parking
128
Part replacement178
Passive safety Before setting off
8
Driving safety8
Passive Safety8
Pedals128
Footmats128
Petrol see fuel
190
Phonebox91
Plastic parts184
Polishing vehicle paint work see vehicle care
183
Positioning the jack
215
Power limitsliding/tilting roof65
Power outlet 12 V
93
Power steering Warning light
33
Power windows61
Button in the front passenger door63
Button in the rear doors63
Practical equipment Reflective vest
211
Practical features 12-Volt power outlet
93
Pockets on the backs of the front seats96
Seat backrest with long cargo channel88
Waste container93
Proactive passenger protection160
Warning light35
ProActive passenger protection Function
160
Protective films183
Puncture repair kit217
R
Radiator fan
196
Radio see Infotainment
4
Radio remote control Auxiliary heating (heating and ventilation)
119
Raising the vehicle215
Rear-view mirror Exterior mirrors
80
Fold in passenger mirror80
Synchronous adjustment of the rear-view mir- ror
80
Rear fog light72
Warning light34
Rear mirror79
Rear View Camera143
Function keys144
Operation143
Orientation Lines144
Rear view mirror Interior mirror
79
Rear window - heater76
Refuelling189
Fuel189
Fuel - natural gas192
Remote control Locking
54
Replacing the battery223
Synchronisation process223
Unlocking54
Remote control key Replacing the battery
223
Removable through-loading bag98
Removing the bar ball, Step 1
170
bar ball, Step 2171
Repairs and technical alterations178
Replace the battery in the auxiliary heating (auxiliary heating) in the remote control
223
Replacing Bulb for the licence plate light
233
Bulbs230
Fuses226
Fuses – engine compartment229
Fuses – LHD227
Fuses – RHD227
Low beam bulb231
Rear window wiper blade226
Vehicle battery203
windscreen wiper blades225
Replenishing Coolant
200
Engine oil198
Windscreen washer fluid196
256Index